Getting Latest Pairs

Latest Trading Pairs for a DEX

Let's see how we can get latest trading pairs created on DEXs. In this example we use Smart Contract Events to track PoolCreated event for Uniswap v3 factory contract. Because whenever a new pool gets created Uniswap v3 factory contract emits a PoolCreated event with the details of the pool.

{
  EVM(dataset: realtime, network: eth) {
    Events(
      orderBy: {descending: Block_Number}
      limit: {count: 10}
      where: {Log: {SmartContract: {is: "0x1f98431c8ad98523631ae4a59f267346ea31f984"}, Signature: {Name: {is: "PoolCreated"}}}}
    ) {
      Log {
        Signature {
          Name
          Parsed
          Signature
        }
        SmartContract
      }
      Transaction {
        Hash
      }
      Block {
        Date
        Number
      }
      Arguments {
        Name
        Value {
          __typename
          ... on EVM_ABI_Integer_Value_Arg {
            integer
          }
          ... on EVM_ABI_String_Value_Arg {
            string
          }
          ... on EVM_ABI_Address_Value_Arg {
            address
          }
          ... on EVM_ABI_BigInt_Value_Arg {
            bigInteger
          }
          ... on EVM_ABI_Bytes_Value_Arg {
            hex
          }
          ... on EVM_ABI_Boolean_Value_Arg {
            bool
          }
        }
      }
    }
  }
}

Open this query on our GraphQL IDE using this link.

Subscribe to the Latest Pairs for Uniswap V3

You can use our GraphQL Subscription (Webhook) to subscribe to these events in case you don't want to call our APIs periodically.

subscription {
  EVM {
    Events(
      where: {Log: {SmartContract: {is: "0x1f98431c8ad98523631ae4a59f267346ea31f984"}, Signature: {Name: {is: "PoolCreated"}}}}
    ) {
      Log {
        Signature {
          Name
          Parsed
          Signature
        }
        SmartContract
      }
      Transaction {
        Hash
      }
      Block {
        Date
        Number
      }
      Arguments {
        Name
        Value {
          __typename
          ... on EVM_ABI_Integer_Value_Arg {
            integer
          }
          ... on EVM_ABI_String_Value_Arg {
            string
          }
          ... on EVM_ABI_Address_Value_Arg {
            address
          }
          ... on EVM_ABI_BigInt_Value_Arg {
            bigInteger
          }
          ... on EVM_ABI_Bytes_Value_Arg {
            hex
          }
          ... on EVM_ABI_Boolean_Value_Arg {
            bool
          }
        }
      }
    }
  }
}

Open this query on our GraphQL IDE using this link